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ASN Wikibase Occurrence # 234164
Last updated: 20 April 2020
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Time:04:16 UTC
Type:Silhouette image of generic F100 model; specific model in this crash may look slightly different
Fokker 100
Owner/operator:Air Niugini
Registration: P2-ANF
C/n / msn: 11351
Fatalities:Fatalities: 0 / Occupants: 48
Other fatalities:0
Aircraft damage: None
Category:Serious incident
Location:about 70nm west of Madang -   Papua New Guinea
Phase: En route
Nature:Domestic Scheduled Passenger
Departure airport:Wewak-Boram Airport (WWK/AYWK)
Destination airport:Port Moresby-Jacksons International Airport (POM/AYPY)
Investigating agency: AIC PNG
A Fokker 100 aircraft, Air Niugini flight PX121, experienced a cabin depressurisation event during a scheduled IFR passenger flight from Boram Airport, Wewak, East Sepik Province to Jacksons International Airport, Port Moresby. The aircraft subsequently diverted and landed at Madang Airport. The Pilot in Command (PIC), during interview with investigators, stated that straight after take-off from Boram, the No.1 engine bleed fault activated on the overhead panel. They subsequently switched the bleed system off and back on again as required by the Fokker 100 Quick Reference Handbook (QRH) Bleed Fault procedure. The fault disappeared and the crew continued with the departure and commenced to climb to Flight Level (FL) 350. The PIC was the designated pilot flying while the copilot was the pilot monitoring.
As the aircraft passed FL 290, it entered cloud. The PIC subsequently activated the aircraft’s engine anti-icing4 system. About 3 to 4 seconds later, the No.1 engine bleed fault light illuminated on the overhead panel, followed another 3 seconds later by the No.2 engine bleed fault. The crew referred to the QRH ‘Double Bleed Fault’ checklist and started the actions. Both pilots donned their oxygen masks and switched off both engines bleed systems. The Master Caution (MC) alert activated 5 seconds after the bleed systems were switched off. The PIC levelled the aircraft off just above FL 300 at 04:14. At 04:15 the PIC broadcast a PAN and subsequently commenced a rapid descent.
At about 04:16, as the aircraft was descending through FL 290, the Master Warning (MW) activated, along with the ‘excessive cabin altitude’7 warning. The crew continued with the rapid descent and began actioning the Quick Reference Handbook (QRH) emergency procedures for ‘Excessive Cabin Altitude’ and ‘Emergency Descent’.
The aircraft levelled off at 10,000 ft, about 35 nm miles South West of Madang.
The PIC then commenced a right turn and proceeded direct to Madang at 10,000 ft. The aircraft was established in the hold at about 10,000 ft at 04:28, and remained in the hold for about 10 minutes before commencing the approach for runway 25. The aircraft landed at 04:46. The crew taxied the aircraft to the parking bay where a normal passenger disembarkation was carried out,
All 48 occupants of the aircraft; two pilots, three cabin crew and 43 passengers did not sustain injuries from the occurrence.


Revision history:

20-Mar-2020 06:45 Petropavlovsk Added
20-Mar-2020 18:48 RobertMB Updated [Registration, Cn, Total fatalities, Other fatalities, Location, Departure airport, Destination airport, Source, Narrative]
22-Mar-2020 16:12 The2ndBaron Updated [Aircraft type]
20-Apr-2020 19:13 harro Updated [Time, Total occupants, Nature, Source, Narrative]

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